Lizzie sure is a beauty. I think cats can be as individually different as people and I have found that it can be a result of environment or more than likely just the way they are when they're born. You can have a whole litter of kittens and one little tyke will hang back, jump down when picked up, never let you catch them, etc. Some people too don't care to be hugged much, need "their space", have a wide comfort zone, etc. Maybe the spaying will help, but I think that we shouldn't take it personal. My Griffin is the same as your Lizzie and I know he'll never change. But it's OK because I know that he's happy, so I'm happy!